Editing Cable modem (section)

===IEEE 802.3b (10BROAD36)===
The [[IEEE]] [[IEEE 802|802 Committee]] defined [[10BROAD36]] in [[10BROAD36|802.3b-1985]]<ref name="IEEE 802.3b (10BROAD36) Standard">[http://standards.ieee.org/findstds/standard/802.3b-1985.html IEEE 802.3b-1985 (10BROAD36)] {{Webarchive|url=https://web.archive.org/web/20120225203804/http://standards.ieee.org/findstds/standard/802.3b-1985.html |date=2012-02-25 }} - Supplement to 802.3: Broadband Medium Attachment Unit and Broadband Medium Specifications, Type 10BROAD36 (Section 11)</ref> as a {{val|10|ul=Mbit/s}} [[IEEE 802.3]]/[[Ethernet]] broadband system to run up to {{convert|3600|m}} over CATV coax network cabling. The word ''[[broadband]]'' as used in the original IEEE 802.3 specifications implied operation in [[Multiplexing#Frequency-division multiplexing|frequency-division multiplexed]] ([[Frequency-division multiplexing|FDM]]) channel bands as opposed to digital ''[[baseband]]'' [[Square wave (waveform)|square-waveform]] [[modulation]]s (also known as [[line coding]]), which begin near zero [[Hz]] and [[Fourier series|theoretically]] consume [[Square wave (waveform)#Fourier Analysis|infinite]] [[frequency bandwidth]]. (In real-world systems, higher-order [[signal]] [[Square wave (waveform)#Fourier Analysis|components]] become indistinguishable from background [[Signal-to-noise ratio|noise]].) In the market [[10BROAD36]] equipment was not developed by many vendors nor deployed in many user networks as compared to equipment for IEEE 802.3/[[Ethernet]] [[Baseband#Baseband Ethernet|baseband]] standards such as [[10BASE5]] (1983), [[10BASE2]] (1985), [[10BASE-T]] (1990), etc.